|
Look out
for
Rhizoctonia
Grower
Solutions Magazine
Lefroy Valley
Dec 2000
Rhizoctonia was, and still is one of the most
devastating disease for Brassica growers in Victoria.
|
 |
Dry, brittle rot of stem at or above soil level. |
|
|
Plant wilts, may collapse and eventually die. |
|
|
Infected stem may be somewhat smaller in
diameter than normal , but tough and woody. |
|
|
Disease is favoured by warm wet soil. |
The
fungus Rhizoctonia Solani is a common soil inhabitant
and can survive for a long time, but will not become
economically destructive until the right environmental
conditions come together. Infection is frequently
initiated by physical damage at soil level (wind,
transplanting or insect damage). Control can be achieved
by soil fumigation, crop rotation, fungicide treatment
and biological treatment. Trichoderma is one of a small
group of beneficial fungi being successfully utilised on
a commercial scale for biological control of pathogenic
fungi.
|
